The calculated distance (air line) between Choi Wun and San Tung Chung Hang is approximately 18 miles respectively 29 kilometers.
By car or train, the actual journey to San Tung Chung Hang is certainly longer, as only the direct route (as the crow flies) between Choi Wun and San Tung Chung Hang has been calculated here.
Air line (approximately)
29 kilometers
15 nautical miles